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High heat conductivity graphene coating for heat dissipation device and preparation method and application

A technology of high thermal conductivity and heat dissipation device, applied in chemical instruments and methods, coatings, heat exchange materials, etc. Difficulties in the field and other problems, to achieve the effect of making up for thermal conductivity, fast thermal conductivity, and strong wetting ability

Inactive Publication Date: 2018-06-15
SU ZHOU CSTAR MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant research has achieved certain results, but the improvement of the overall performance of heat sinks is relatively limited, and it is still difficult to meet the cooling needs of some high-power electrical appliances. Therefore, research on high thermal conductivity heat sinks is still a difficult and hot topic in the academic field.

Method used

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  • High heat conductivity graphene coating for heat dissipation device and preparation method and application
  • High heat conductivity graphene coating for heat dissipation device and preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] a. Weigh 1g graphene and 99g ultrapure water, equip a graphene solution with a mass fraction of 1%, weigh 0.001g sodium hexadecylbenzenesulfonate according to the mass ratio of graphene: dispersant=1:0.001 Add it into the graphene solution as a dispersant, and ultrasonically disperse it for 50 minutes to form a uniform and stable graphene dispersion.

[0035] b. according to graphene: adhesive: mass ratio of thickener=1:0.2:0.3, weigh 0.2g aqueous epoxy resin and 0.3g gum arabic respectively, add successively in the graphene dispersion in step a, Stir magnetically for more than 6 hours until a uniform and stable graphene slurry with a certain viscosity is formed.

[0036] c1. At room temperature, spray the graphene slurry in step b and deposit it on the surface of the heat dissipation component of the heat dissipation device by brushing, and then perform drying treatment at a temperature of 70°C for 25 minutes.

[0037] c2. Coating the heat dissipation parts after dryi...

Embodiment 2

[0039]a. take by weighing 3g graphene and 97g ultrapure water, be equipped with the graphene solution that mass fraction is 3%, according to the mass ratio of graphene: dispersant=1:0.005, weigh 0.015g hexadecyl trimethyl bromide Ammonium chloride was added into the above-mentioned graphene solution as a dispersant, and the cell pulverizer was dispersed for 40 minutes to form a uniform and stable graphene dispersion.

[0040] b. according to graphene: adhesive: mass ratio of thickener=1:0.4:0.2, weigh 1.2g aqueous polyurethane and 0.6g sodium carboxymethyl cellulose respectively, add the graphene dispersion in step a successively , magnetic stirring for more than 6h until a uniform and stable graphene slurry with a certain viscosity is formed.

[0041] c1. At room temperature, the graphene slurry in step b is atomized and deposited on the surface of the heat dissipation component of the heat dissipation device using a scraper coating method, and then dried at a temperature of ...

Embodiment 3

[0044] a. take by weighing 4g graphene and 96g ultrapure water, be equipped with the graphene solution that mass fraction is 4%, according to the mass ratio of graphene: dispersant=1:0.008, weigh 0.032g lauryl polyoxyethylene ether as dispersion Add the above-mentioned graphene solution, and ball mill for 120min until a uniform and stable graphene dispersion is formed.

[0045] b. according to graphene: adhesive: the mass ratio of thickener=1:0.7:0.1, weigh 2.8g polyacrylamide and 0.4g polyethylene oxide respectively, add successively in the graphene dispersion in step a, Stir and disperse for more than 6 hours until a uniform and stable graphene slurry with a certain viscosity is formed.

[0046] c1. At room temperature, adopt the spraying method, which is the electrostatic spraying method in the present embodiment, so that the graphene slurry in step b is evenly deposited on the surface of the heat dissipation component of the heat dissipation device, and then dried at a tem...

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Abstract

The invention relates to a high heat conductivity graphene coating for a heat dissipation device and a preparation method and application. The high heat conductivity graphene coating disclosed by theinvention is prepared through the following steps: preparing graphene dispersion liquid, then adding an adhesive and a thickener to the graphene dispersion liquid, dispersing to obtain a homogeneous and stable graphene mixed slurry, uniformly coating the graphene mixed slurry on the surface of a heat dissipation component of the heat dissipation device, then drying, thus being capable of obtaininga uniformly coated graphene coating. According to the invention, the high heat conductivity graphene coating is directly coated on the surface of the heat dissipation component, and high in binding force with a substrate of the heat dissipation component, so that thermal conduction properties of the heat dissipation component can be obviously improved, furthermore, the waterproof adhesive and thehydrophilic thickener are used, therefore, the wettability of the graphene coating on water can be further enhanced to prevent condensate water from directly condensing into water drops on the surface of heat dissipation component so as to increase the heat exchange area.

Description

technical field [0001] The invention relates to a high thermal conductivity graphene coating for a heat dissipation device, a preparation method and application thereof. Background technique [0002] Many household appliances, mechanical equipment, etc. need to install heat dissipation devices to dissipate heat to ensure the normal operation of the machine and prevent certain components from working in high temperature and shortening their service life. As a household appliance, air conditioners can not only adjust the indoor temperature, but also have the functions of dehumidification and air purification. With the improvement of people's living standards, air conditioners have entered thousands of households, bringing a little coolness to everyone in the hot summer. In order to save resources, protect the environment and meet the diverse needs of people, air conditioners are developing in the direction of high power, miniaturization, light weight and environmental intellig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/26C09D163/00C09D175/04C09D7/43C09D7/61C09D7/63C09K5/14H05K7/20
Inventor 张力张丽亚徐冬春
Owner SU ZHOU CSTAR MATERIAL TECH CO LTD
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